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Hysteresis

The material ...

Question

The material for making permanent magnets should have

A

high retentivity, high coercivity

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B

high retentivity, low coercivity

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C

low retentivity, high coercivity

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D

low retentivity, low coercivity

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Solution

The correct option is A high retentivity, high coercivity
Factual. The material for making permanent magnets should have high retentivity and high coercivity.

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Similar questions

Q. The desirable properties for making permanent magnets are
(a) high retentivity and high coercive force
(b) high retentivity and low coercive force
(c) low retentivity and high coercive force
(d) low retentivity and low coercive force

Q. Electromagnets are made of soft iron because soft iron has
(a) high retentivity and high coercive force
(b) high retentivity and low coercive force
(c) low retentivity and high coercive force
(d) low retentivity and low coercive force

Q. Permanent magnet has properties retentivity and coercivity respectively as:

Q. In the given question, a statement of Assertion

(A)

is given, followed by a corresponding statement of Reason

(R)

just below of it. Mark the correct answer.

Assertion

(A)

: AlNiCo is used for making permanent magnets.

Reason

(R)

: It has a high retentivity and high coercivity.

Q. What is hysteresis? Define the terms 'coercivity' and 'retentivity' of a ferromagnetic material.

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